The HTTP Interceptors are used to Set Http Headers Request in Angular 4 using the import from “@angular/common/http”. The HTTP Interceptors are available in Angular 4.x versions.

The HTTP Interceptors are not supported in Angular 2. We are creating the HttpClient Injectable class to achieve this. You can see the below examples for set http headers request with and without HTTP interceptors.

What Is the Use of Interceptors in Angular 4?

The Interceptors is a common used to set default headers for all responses.